PHOTOSYNTHESIS - Nutrition in Plants (Overview) - CBSE Class 7 Science Video Lecture

Nutrition implants nutrients are the
materials present in our food they are
useful for our body growth they are
carbohydrates proteins fats vitamins and
minerals carbohydrates carbohydrates are
instant energy sources of food example
glucose
proteins proteins are the building
blocks of the body they are very helpful
in grow example egg yolk fats fats are
stored energy forms of the body they are
the main constituents of adipocytes
which are fat storing cells example
vitamins and minerals are the accessory
supplements of food
all the organisms require food to live
plants synthesize their own food but
animals including man depend on plants
for their food an auto tropic mode of
nutrition example photosynthesis
photosynthesis is a process by which a
plant uses raw materials like water
minerals carbon dioxide in the presence
of sunlight to synthesize the food the
synthesis of food takes place in leaves
which are the food factories of plant
water and minerals are absorbed by the
root from the soil it is transported to
the leaf by the pipe like vessels which
run from the root stem
branches
and leaves
carbon dioxide is taken from air through
small pores on the leaf these small
pores are Calder's to matter they are
opened and closed by guard cells
sunlight is captured by the chlorophyll
pigment present in the leaves it is a
green colored pigment present inside the
chloroplasts of the leaf now by
photosynthesis photo meaning light and
synthesis meaning to combine leaves
capture the solar energy and store it in
the form of food so Sun is said to be
the ultimate source of energy
photosynthesis releases oxygen which is
the principal element of life when we
see the process carbon dioxide plus
water plus minerals in the presence of
sunlight with the pigment chlorophyll
synthesize carbohydrates which are the
energy sources and the oxygen which is
released into atmosphere
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